Open an existing sequence to change copy, see it as the recipient will, and add people.
Click "Edit" next to a sequence.
Each step shows its channel, the wait before it, and the first line of the message.
Click "Edit" on a step to change the subject and body. Merge fields like {firstName} and {company} fill in per contact.
Click the eye icon to preview the step as a specific recipient would see it.
Click "A" / "+" on a step to add a B variant for an A/B test.
Click "Pause" to stop all sends from this sequence; click again to resume.
Click "Enroll contacts" to add people, or add them from the Contacts page with Actions → Add to sequence.